No law contained in any of the statutes of Montana is retroactive unless expressly so declared.
Mont. Code Ann. § 1-2-109
When laws retroactive
Applied in 3 court decisions — leading case 791 F. Supp. 1450 - Towe Antique Ford Foundation v. Internal Revenue Service, Department of Treasury, United States (1992)
Most recently applied in 266 F. Supp. 2d 1238 - Montana v. Atlantic Richfield Co. (May 2003)
En
How often courts cite this section
Court decisions citing this, by year. The dip in the last several years is a data-coverage gap, not a real trend — our corpus holds fewer opinions from the most recent years, so recent citations are undercounted.
Official source: Montana Code Annotated (Montana Legislature). Reproduced from public-domain Montana statutes; confirm against the official source for the current text. Not legal advice.